CSS validation

Issue Summary

Ran into some CSS errors though:

all/themes/deco/style.css?f
23 table Value Error : font Parse Error [empty string]
33 pre, code Parse Error *font-size:100%;
34 pre, code Parse error - Unrecognized }
330 fieldset legend Lexical error at line 329, column 40. Encountered: "`" (96), after : "" ` display: block;
331 margin-left Parse Error margin-left:1em;
332 font-size Parse Error font-size: 1.1em;
333 font-weight Parse Error font-weight: bold;
334 color Parse Error color: #444;
335 background Parse Error background: none;
336 background Parse error - Unrecognized }
491 #header h1 Property text-shadow doesn't exist in CSS level 2.1 but exists in [css2, css3] : #0d0d0d 0 1px 3px
1573 td.menu-disabled Property opacity doesn't exist in CSS level 2.1 but exists in [css3] : 0.5